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% brightness circuit

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SoulFire!

New Member
HI!

I've been tasked with designing
a light dimmer for a 60W a.c driven
lamp, which must also be in flash mode
when the system senses night.

Question is, how do i calculate the
70% brightness required? And then
how can i apply that to the selection
of the dimmer circuit parameters.

**broken link removed**

Detailed info can be found at the above.
I would appreciate your help.

Thanks!
 
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Your link is just the filesharing site, no obvious indication of your problem.
Just post the problem here, or is this just some promotional spam?

JimB
 
Hi Jim,
I think noobies cannot attach schematics here until they are "passed" by a moderator to avoid SPAM. So the OP attached his schematic over at RapidShare who takes all day to wake up and is full of ads.
 
Rapidshare? Did someone post a dirty movie?

Soulfire - get a lightmeter, there's really no other way to do it. You are working with a filament resistance and light spectrum that change at lower temperature. Crank down the juice until you get 70% of what it is at spec. Use this empirical data to set the power.
 
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